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https://issues.apache.org/jira/browse/AIRFLOW-1479?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16109053#comment-16109053
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Ash Berlin-Taylor commented on AIRFLOW-1479:
--------------------------------------------
Oh. {{DEVNULL}} is only a Py3 thing. The portable equivalent is:
{noformat}
FNULL = open(os.devnull, 'r')
retcode = subprocess.call(['echo', 'foo'], stdin=FNULL, ....)
{noformat}
> BashOperator does not open pipe for STDIN
> -----------------------------------------
>
> Key: AIRFLOW-1479
> URL: https://issues.apache.org/jira/browse/AIRFLOW-1479
> Project: Apache Airflow
> Issue Type: Bug
> Components: operators
> Affects Versions: 1.8.1
> Environment: FreeBSD, JRuby 9.x, Rake, Python 2.7, Airflow 1.8
> Reporter: Cedrik Neumann
> Priority: Trivial
> Labels: easyfix
>
> From JRuby 9 onwards we experienced issues when executing Rake tasks via the
> BashOperator with the error message:
> {noformat}
> Errno::EBADF: Bad file descriptor - 0
> {noformat}
> We figured out that the issue is due to a missing pipe for STDIN when the
> BashOperator calls `Popen`.
> The quick fix of the issue would be to add a pipe for STDIN as well:
> {code:python}
> sp = Popen(
> ['bash', fname],
> stdout=PIPE, stderr=STDOUT, stdin=PIPE,
> cwd=tmp_dir, env=self.env)
> {code}
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